[Octave-bug-tracker] [bug #55071] SegFault, calling contour()

[Rik]

Follow-up Comment #3, bug #55071 (project octave):

Confirmed.  This isn't valid syntax, but it shouldn't segfault.  The problem
seems to lie behind contour with countourc which actually calculates the
levels.  


 -- [C, LEV] = contourc (Z)
 -- [C, LEV] = contourc (Z, VN)
 -- [C, LEV] = contourc (X, Y, Z)
 -- [C, LEV] = contourc (X, Y, Z, VN)
     Compute contour lines (isolines of constant Z value).

     The matrix Z contains height values above the rectangular grid
     determined by X and Y.  If only a single input Z is provided then X
     is taken to be '1:columns (Z)' and Y is taken to be '1:rows (Z)'.

     The optional input VN is either a scalar denoting the number of
     contour lines to compute or a vector containing the Z values where
     lines will be computed.  When VN is a vector the number of contour
     lines is 'numel (VN)'.  However, to compute a single contour line
     at a given value use 'VN = [val, val]'.  If VN is omitted it
     defaults to 10.


I get a segfault on the original data


octave:2> Z = 0:0.1:10;
octave:3> VN = sin (Z);
octave:4> C = contourc (Z, VN)
fatal: caught signal Segmentation fault -- stopping myself...
Segmentation fault (core dumped)




    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?55071>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/